User's Guide
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HT81x User Guide 
Register a SIP Account 
The HT81Xsupport 2 profiles which can be configured with 2 SIP accounts. Please refer to the following 
steps in order to register your accounts via web user interface 
1.  Access your HT81X web UI by entering its IP address in your favorite browser. 
2.  Enter your admin password (default: admin). 
3.  Press Login to access your settings. 
4.  Go to Profile (1 or 2) pages. 
5.  In Profile tab, set the following: 
a.  Account Active to Yes. 
b.  Primary SIP Server field with your SIP server IP address or FQDN. 
c.  Failover  SIP  Server  with  your  Failover  SIP  Server  IP  address  or  FQDN.  Leave  empty  if  not 
available.   
d.  Prefer Primary SIP Server to No or Yes depending on your configuration. Set to No if no Failover 
SIP  Server  is  defined.  If  βYesβ,  account  will  register  to  Primary  SIP  Server  when  failover 
registration expires. 
e.  Outbound Proxy: Set your Outbound Proxy IP Address or FQDN. Leave empty if not available. 
6.  After configuring the SIP server and activating the profiles, you should access to FXS Ports page to 
register your accounts. In FXS Ports tab, set the following:   
a.  SIP User ID: User account information, provided by VoIP service provider (ITSP). Usually in the 
form of digit similar to phone number or actually a phone number. 
b.  Authenticate  ID:  SIP  service  subscriberβs  Authenticate  ID  used  for  authentication.  Can  be 
identical to or different from SIP User ID. 
c.  Authenticate Password: SIP service subscriberβs account password to register to SIP server of 
ITSP. For security reasons, the password field will be shown as empty. 
d.  Name: Any name to identify this specific user. 
e.  Set Enable Portto Yes. 
7.  Press Apply at the bottom of the page to save your configuration. 
Figure 12: SIP Profiles Settings 










